As far as I remember, the br-ex situation was tricky on rdo. You could read something about it here: https://openstack.redhat.com/Neutron_with_existing_external_network (could be obsolete)

At some point, rdo was able to add br-ex, but did it wrong, leaving users without connectivity, there was some work/patch on the way to fix how puppet handled br-ex setup (as per document above) but I don't know what happened to it.

In my own experience (haven't tested packstack since icehouse), having br-ex already configured with an slave connected to the external network prior to running packstack was the best way to have everything working as it was supposed to after rdo finished

On Mon, Feb 16, 2015 at 9:03 AM, Deepak Shetty <dpkshetty@gmail.com> wrote:

Hi,

  Do we have any documentation on whats the right way in RDO for the Nova VMs connect to external network (eg: 8.8.8.8). I asked this on #rdo but didn't get a response, hence this mail.

I am aware of the br-ex - eth0/1/2 magic (i know it from my devstack experience), but wondering if we need to do the same manually on the RDO network node or there is some automation way of achieving it in RDO ?

I am on a 3-node RDO setup (Controller, Network, Compute), using rdo-release-juno-1.noarch

thanx,
deepak

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Elías David.

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